diff --git a/pyproject.toml b/pyproject.toml
index e53de42b..aea4751a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ dependencies = [
 rdt = { main = 'rdt.cli.__main__:main' }
 
 [project.optional-dependencies]
-copulas = ['copulas>=0.10.0,<0.11',]
+copulas = ['copulas@git+ssh://git@github.com/sdv-dev/copulas@main#egg=copulas',]
 test = [
     'rdt[copulas]',
 
diff --git a/rdt/transformers/categorical.py b/rdt/transformers/categorical.py
index 16ae6ff0..e077f5be 100644
--- a/rdt/transformers/categorical.py
+++ b/rdt/transformers/categorical.py
@@ -6,7 +6,6 @@
 import numpy as np
 import pandas as pd
 from scipy.stats import norm
-from pandas.api.types import is_numeric_dtype
 
 from rdt.errors import TransformerInputError
 from rdt.transformers.base import BaseTransformer
diff --git a/tests/integration/transformers/test_categorical.py b/tests/integration/transformers/test_categorical.py
index 5ae02b66..907df485 100644
--- a/tests/integration/transformers/test_categorical.py
+++ b/tests/integration/transformers/test_categorical.py
@@ -474,6 +474,7 @@ def test_one_hot_categoricals():
 
     # Run
     transformed_data = transformer.fit_transform(test_data, column='A')
+
     # Assert
     pd.testing.assert_frame_equal(
         transformed_data,